<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<h3>第一种</h3>
<form action="/param1">
  <input type="text" name="info">
  <input type="submit">
</form>

<h3>第二种</h3>
<form action="/param2">
    <input type="text" name="name" placeholder="名字">
    <input type="text" name="age" placeholder="年龄">
    <input type="submit">
</form>

<h3>第三种</h3>
<form action="/param3">
    <input type="text" name="username" placeholder="用户名">
    <input type="text" name="password" placeholder="密码">
    <input type="text" name="nick" placeholder="昵称">
    <input type="submit" value="注册">
</form>

</body>
</html>